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Cisco ASA Series Firewall ASDM Configuration Guide
Chapter 5 Configuring Twice NAT (ASA 8.3 and Later)
Configuring Twice NAT
Step 5 Choose Dynamic PAT (Hide) from the Match Criteria: Translated Packet > Source NAT Type
drop-down list.
This setting only applies to the source address; the destination translation is always static.
Note To configure dynamic PAT using a PAT pool, choose Dynamic instead of Dynamic PAT (Hide),
see the “Configuring Dynamic NAT or Dynamic PAT Using a PAT Pool” section on page 5-4.
Step 6 Identify the translated packet addresses, either IPv4 or IPv6; namely, the packet addresses as they appear
on the destination interface network (the mapped source address and the real destination address). You
can translate between IPv4 and IPv6 if desired. See the following figure for an example of the original
packet vs. the translated packet.